Wrench.



Invencor:

PATENTED MAY 21, 1907. F. MoARTH'UR.

WRENCH.

APPLICATION FILED MAB. 2. 190a.

WfinesSes UNITED STATES PATENT oEEIoE.

FINLAY MOARTHUR, OF MONTREAL, QUEBEC, CANADA.

WRENCH- Specification of Letters Patent.

Patented May 21, 1907.

Application filed March 2,1906. Serial No. 303,910.

' new and useful Improvements in Wrenches,

of which the following is a specification.

This invention relates to new and useful improvements in quick actingwrenches including a fixed jaw, a movable aw, a spiral extendinglongitudinally of the wrench, and means operated. from said spiral, forquickly adjusting the position of the movable jaw from saidspiral, andconsists in certain features of novelty in the details of constructionall as hereinafter more fully set forth, and specifically pointed out inthe claims.

The object of this invention is to provide means whereby such a wrenchmay be quickly adjusted to position, and comprises in its constructionmeans to render the wrench available for ordinary use in the event ofthe quick acting feature becoming, for any reason, inoperative for thetime being. i

Referring to the accompanying drawings in which similar letters ofreference denote corresponding parts in all the figures; Figure 1 is aside elcvational view of the improved wrench; Fig. 2 is a longitudinal,central, sectional view, taken through the wrench; Fig.

.3 is a sectional view taken on line 33 of Fig. 2 Fig. 4 is afragmentary sectional view showing a modified construction hereinafterdescribed. I

Referring to the parts a is the shank of the wrench, having on one endthe fixed aw b, a slidable jaw 0 being provided as is common inwrenches. On the shank a is secured a handle-shell d which is secured inposition by means of the pin a, which passes through the handle andshank to secure them together. As will be observed in Fig. 2 the shankis recessed at f and at g, and in the recess f is seated a spirallythreaded member h which passes through a perforation i formed in one lugj of the shank and is seated in the inserted screw-threaded bearingblock 7c which is screwed into position in the lug Z at the op-.

posite end of said shank, there being a pinion m on said spiral itwithin the recess 9, while the end of the spiral is seated in a suitablerecess beyond said pinion, as shown in Fig. 2. The bearing block it isheld in position by means of the pin it which is put in position beforethe handle is placed in position.

The handle-shell d is hollow, and is prefer ably constructed withsuflicient opening at one endfor the insertion of the nut 0, whichslides on the spiral for the purpose of rotating the pinion referred to,and said nut is manipulated by means of the finger pieces pp which slideoutside the handle, and are pinned to said nut by means of the pins Q,

as best shown in the sectional view, Fig. 3, said finger pieces beingpreferably roughened to afford a better grasp in operation. In the eventof the opening made in the handle for the insertion of the shank notbeing large enough for the nut, the block 7 may be used and sufficientspace he left therefor in the end of the handle, and when this block isused it should be locked in position by means of the pin 8, as shown inFig. 2.

Seated at one end in a recess in the forward end of the handle and atits opposite end in a screw-threaded orifice in the slidable jaw, is ascrew-threaded stem t, which en gages the slidable jaw to actuate thesame. On this stem t is a pinion "a which meshes with said pinion'm,while a burred thumb piece 1) is placed on said stem in closejuxtaposition to, or is formed integral with, said pinion a. Thelongitudinal axes of the spiral and said stem 2, are approximatelyparallel, and it is evident that when the nut 0 is moved longitudinallyof the spiral h that said spiral will be caused to rotate, owing to thefact that the said nut is angular at its top and bottom sides, andclosely fits within the s ace between the said handle shell and the s*iank of the wrench, though suflicient room is left to avoid unnecessaryfriction. The

ends of the spiral are slightly tapered to avoid friction, and it isevident that the parts should be so proportioned as to permit easymanipulation.

Owing to the fact that the stem t is out of alinement with the spiralthe strain on said spiral is materially reduced and no ordinary use ofthe wrench will throw it out of commission, but, if by any reason thespiral ITO thereof projecting through the slot left in said handle, andthe thumb pieces p are secured by the pins (1 to said attenuatedportions.

I am aware that minor changes may be made in the form and position ofthe parts shown in the accompanying drawings without departing from thespirit of the invention, and it is my intention to claim all such.modifications as may be within the scope of the following claims.

Having described the invention, what is claimed as new is;

1. In a wrench of the character described, the combination comprising ashank with a fixed jaw thereon, a handle shell fixed on said shank, ajaw slidable on said shank, a spiral mounted in said shank, a nut onsaid spiral, an approximately arallel screw-threaded stein seated insaid iandle and slidable jaw, and pinions adapted to transmit rotary motion from said s iral to said stem, and thereby to the slidab e jaw.

2. In a wrench, the combination comprising a fixed jaw, a shank on saidjaw, a rotatable spiral mounted in said shank, a pinion on the saidspiral, a nut on said spiral, a slidable jaw and a handle shell mountedon said shank, a screw-threaded stem seated in said handle and rotatablein a correspondingly screw-threaded orifice in said slidable jaw and apinion on said stem in mesh with the first mentioned pinion.

3. In a wrench, the combination comprising a recessed shank, having afixed jaw thereon, a recessed slidable jaw, a handle fixed on saidshank, a nut on said spiral, a pinion on the spiral in the recess of theshank,

a screw-threaded stem seated in said handle and engaging said slidablejaw, a burred thumb piece and a pinion on said stem, said pinion meshingwith the first mentioned pinlon.

4. In a wrench, the combination comprising a recessed shank having afixed jaw thereon, a slotted handle shell rigidly mounted. ed on saidshank, a spiral rotatably mounted in the said shank, a pinion fixed onsaid spiral, a nut on said spiral, said nut being guided between theshank and handle-shell, a slidable jaw, having screw-threaded orificetherein, a screw threaded stem seated in said orifice and in the handle,a thumb piece on said stem, and a removable bearing in said shank forone end of said spiral.

5. In a wrench of the character described, the combination comprising arecessed shank having a fixed jaw thereon, a bearing mounted in aperforation in said shank, a spiral mounted in said bearing at one endand proj ecting through a perforation in said shank at the opposite end,a pinion on said spiral in a recess in said shank, a nut on said spiral,a slidable jaw, a handle, a stem mounted in said handle and slidablejaw, and a pinion thereon in mesh with said first mentioned pinion.

In testimony whereof I have signed my name to this specification in thepresence of two attesting witnesses.

FINLAY MGARTHUR.

lVitnesses:

F. H. GIBBS, I. H. ELLIOTT.

